Feature: 1. The flow direction of peristaltic pump depends on the connection method of positive and negative stages of power supply, and the terminal can choose the positive and negative stages at will. 2. This micro peristaltic pump is made of high quality engineering plastics, durable, wear-resistant and not easy to damage. 3. Silent design, no noise when working, simple operation method, long service life. 4. With good sealing performance, exquisite workmanship, stable and reliable performance, it can be used at ease. 5. It is widely used in experiments, biochemical analysis, pharmacy, fine chemical industry, bioengineering, pharmaceutical filling, food, paper industry, ceramics, water treatment, environmental protection, powder and other fields. Specification: √Condition: 100% Brand New Item Type: Dosing Pump Material: Engineering Plastic Applicable Power Supply: DC 6V Working Environment: Temperature: 0-40 °C, Relative Humidity: <80% Flow Range: 0-60ml/min Speed Range: 0.1-60rpm Weight: Approx. 70g / 2.5oz Size: Motor: Diameter: Approx. 32mm / 1.3in Height: Approx. 23mm / 0.9in Pump Head: Approx. 54x46mm / 2.1x1.8in Installtion Hole: Approx. 47mm / 1.9in Pump Tube: Inner Diameter: Approx. 2.2mm / 0.09in Outer Diameter: Approx. 4.5mm / 0.18in Package List: 1 x Dosing Pump Note: 1.Please allow 0-1 inch error due to manual measurement. Thanks for your understanding.2.Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.